Rice grain oil is a valuable nutrient source. However, the genetic basis of oil biosynthesis in rice grains remains unclear. In this study, we performed a genome-wide association study on oil composition and oil concentration in a diverse panel of 533 cultivated rice accessions. High variation for 11 oil-related traits was observed, and the oil composition of rice grains showed differentiation among the subpopulations. We identified 46 loci that are significantly associated with grain oil concentration or composition, 16 of which were detected in three recombinant inbred line populations. Twenty-six candidate genes encoding enzymes involved in oil metabolism were identified from these 46 loci, four of which (PAL6, LIN6, MYR2, and ARA6) were found to contribute to natural variation in oil composition and to show differentiation among the subpopulations. Interestingly, population genetic analyses revealed that specific haplotypes of PAL6 and LIN6 have been selected in japonica rice. Based on these results, we propose a possible oil biosynthetic pathway in rice grains. Collectively, our results provide new insights into the genetic basis of oil biosynthesis in rice grains and can facilitate marker-based breeding of rice varieties with enhanced oil and grain quality.Human pluripotent stem cell (hPSC)-derived progenies are immature versions of cells, presenting a potential limitation to the accurate modelling of diseases associated with maturity or age. Hence, it is important to characterise how closely cells used in culture resemble their native counterparts. In order to select appropriate time points of retinal pigment epithelium (RPE) cultures that reflect native counterparts, we characterised the transcriptomic profiles of the hPSC-derived RPE cells from 1- and 12-month cultures. We differentiated the human embryonic stem cell line H9 into RPE cells, performed single-cell RNA-sequencing of a total of 16,576 cells to assess the molecular changes of the RPE cells across these two culture time points. Our results indicate the stability of the RPE transcriptomic signature, with no evidence of an epithelial-mesenchymal transition, and with the maturing populations of the RPE observed with time in culture. https://www.selleckchem.com/products/bromoenol-lactone.html Assessment of Gene Ontology pathways revealed that as the cultures age, RPE cells upregulate expression of genes involved in metal binding and antioxidant functions. This might reflect an increased ability to handle oxidative stress as cells mature. Comparison with native human RPE data confirms a maturing transcriptional profile of RPE cells in culture. These results suggest that long-term in vitro culture of RPE cells allows the modelling of specific phenotypes observed in native mature tissues. Our work highlights the transcriptional landscape of hPSC-derived RPE cells as they age in culture, which provides a reference for native and patient samples to be benchmarked against.Virtual reality becomes popular in laparoscopic surgery especially in the training process. An assessment on the learning curve of virtual reality compared to other methods of training or no training needed to be carried out.
A systematic literature search between 2000 and 2020 was performed through PubMed, Cochrane library's Central, Embase, Clinicaltrials.gov, and Web of Science. All randomized controlled studies included kept the consistency of participants at the baseline and set the same time or repetitions of training. This systematic review and meta-analysis was under the guidance of the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) and Assessing the methodological quality of systematic reviews(AMSTAR).
Twenty-three randomized controlled studies and five non-randomized concurrent controlled studies were included among 2692 searched studies. Virtual reality was recommended to be applied among no experience medical students or novice surgeons in the laparoscopic trainiwith further analyses. More importantly, the cost-effectiveness of virtual reality in the training process and patient safety were badly in need of discussion.Recurrent Pregnancy Loss (RPL) affects about 1% of all couples and is likely to cause therapeutic vagrancy and psychological distress. Multiple origins can explain RPL, and recent studies suggest the influence of chronic endometritis. The aim of our study is to evaluate the impact of antibiotic treatment on obstetrical prognosis among patients consulting for RPL with isolated chronic endometritis.
We conducted a monocentric retrospective comparative study. Patients consulting for RPL, with normal etiologic examinations (except for chronic endometritis), were included. In the case of chronic endometritis, patients could receive antibiotic treatment (14 days of doxycycline and metronidazole). Pregnancy outcomes, collected one year after inclusion, were compared between 3 groups patients without chronic endometritis, patients with treated chronic endometritis, patients with untreated chronic endometritis. Univariate and multivariate analyses were performed.
42 patients were included. 22 patients had chronic endometritis. Groups were comparable in terms of age, BMI, the number of miscarriages, tobacco consumption, AMH, and FSH levels on day 2. In multivariate analysis, a significant improvement of live birth rate was observed among patients treated for chronic endometritis, compared to the no endometritis group (OR 21.4 [1.93-236.70] p?=?0.013) and the untreated endometritis group (OR 24.90 [1.64-376.93] p?=?0.020).
In our patients examined for RPL, the live birth rate was improved after treatment of chronic endometritis with 14-day antibiotic treatment in comparison to patients with untreated chronic endometritis.
In our patients examined for RPL, the live birth rate was improved after treatment of chronic endometritis with 14-day antibiotic treatment in comparison to patients with untreated chronic endometritis.On March 14, 2020, France has entered into stage 3 of the COVID-19 pandemic. The French National Health Agency (Haute Autorité de Santé) has urgently recommended the use of medical abortion at home between 7 and 9 weeks of gestation and telemedicine for medical abortion consultations. The main objective of this study was to assess whether the emergency measures undertaken for the management of abortions during the COVID-19 pandemic led to practice changes, and to obtain practitioners' opinions regarding the continuation of these measures.
This was a retrospective, quantitative, online self-administered survey from August 6, 2020 to October 2, 2020, aimed at health workers performing abortions (midwives, general practitioners, gynecologists obstetricians and medical gynecologists) in the South and Corse regions in France.
Among the 124 practitioners included, 59/77 (76.6 %) offered medical abortion at home between 7 and 9 weeks of gestation and 61/89 (68.5 %) of them wished to carry on this practice. 55/123 (44.